Bag-machine.



No. 685,805. Patehted Nov. 5,, IBM. 6. R. WARD.

BAG MACHINE.

(Application filed Dec. 7, 1900.]

3 Shank-Sheet I.

(No Model.)

INVENTOR,

.ATTORNEY WITNESSES THE News PETERS co, Mom-Una.v WASHINGTON, n c.

No. 685,805. Patentd Nov. 5, l90l.

. a. R. WARD.

BAG MACHINE.

(Application filed Dec 7, 1900.) (No Model.) 3 Sheets-Sheet WITNESSES:INVENTOR I 5 W V ATTORNEY m: Nam-s PEFILRG c0, vumuuwn :MSHINGTQN. o c

No. 685,805. Patented Nov. 5, I901.

G. B. WARD.

BAG MACHINE.

(Application filed Dec. 7, 1900.

3 Shaets-$haet 3.

' ATTORNEY T WITNESSES (No Model.)

w: mums FIE'VERS cc. Pncwoumo. WASHINGTON. 0v 0 UNITED STAT S PATENTOFFICE.

GEoRGE R. WARD, on NEW YORK, N. Y., ASSIGNOR TO CHARLES F. ooEURN, OFBOSTON, MASSACHUSETTS.

BAG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 685,805, dated November5, 1901. Application filed December 7, 1900. Serial No. 39,039. (Nomodel.)

To all whom it may concern:

Be it known that I, GEORGE R. WARD, a citizen of the United States,residing at New York, N. Y., have invented certain new and usefulImprovements in Bag-Machines, of which the following is a clear, full,and exact description.

My invention relates to bag-folding machines, and one of my objects isto provide a machine which will receive a bag and fold it into the formdesired.

It is desirable in a completed bag that when it is distended by air orby the material with which it is filled its bottom should automaticallyassume an angular, preferably a rectangular, shape. One object of mypresent invention is to provide a machine which will so fold a bag thatit will when distended assume the rectangular-bottomed form desired.

In the preferred embodiment of my invention shown in the drawings I haveprovided a machine which will receive a bellows-folded bag in aflattened condition and distend the bottom-forming end of the same intothe rectangular shape and then fold back a part of said bottom,preferably upon the outside of the bag, thus defining the edges of therec- 'tangular bottom.

Other advantages of my invention will be apparent, and the inventionwill be defined in the claims.

In the drawings, showing the preferred embodiment of my invention,Figure 1 shows a side elevation of my machine, the bag being shown indotted lines and with its bottom distended into the rectangular form.Fig. 2 shows a plan view of the same. Fig. 3 is a front elevation of thedevice shown in Fig. 1, the parts in front of the line A B in Fig. 1having been removed. Fig. 4 shows a central vertical section through thehollowed rolls looking in the opposite direction in Fig. 3 at the timewhen the suction devices commence to act on the bag, adjacent partsbeing shown in dotted lines. Figs. 5 and 6 are detail views of thefolding devices at ditferent points in the operation. Fig. 7 shows acommon bellows-folded bag, such as is preferably operated upon by themachine; and

Fig. 8 shows the bag as it is delivered from the preferred embodiment ofthe machine. Fig. 9 shows a detached side elevation of one of the upperstationary cams; Fig 10, an edge elevation of the cam shown in Fig. 9,if it were split and opened out into a straight bar. Figs. 11 and 12 aresimilar views of one of the lower stationary cams.

In the above preferred embodiment, l is the base, and 2 2 the sides ofthe frame of the machine, in which are mounted the shafts 3 3. In thepresent form of the machine the bottom-forming end of the flattened bagis received between a set of rollers 3 3, mounted on said shafts androtated preferably continuously -that is, not forward and thenbackward-by the meshing gears 9 9 on said shafts and .in the directionsshown by the arrows in Fig. 1. The bag is caught between the rolls andfed forward, and inorder to distend the bottom-forming end of the same Ihave provided a rotatable suction device, which is adapted to contactwith the bag and distend or assist in distending the bottom-forming endof the same into a rectangular shape. Where the rollers are used, Iprefer to have a suction device for eachroll and make them rotatabletherewith. In the embodiment shown I have hollowed out the rolls andprovided them with preferably a plurality of apertures 3, as seen inFig. at and in dotted lines in Fig. 1. The bag is gripped by the rolls ashort distance before the apertures come to the position shown in Fig.4. WVhen the rolls arev rotated, the bag is fed forward and thesuction-apertures 3 are covered by the plies of the bag. As the rollsare further rotated to the positions shown in Figs. 5 and l the air maybe exhausted from the same. I may use. any suitable device, such as iswell known at present, for exhausting the air from the suction devices.As the rolls are rotated the suction-apertures move apart and carry withthem the plies of the bag, thus distending the bottom of the samepreferably into the rectangular form shown in Figs. 1 and 3. In order toassist in so distending the bag, I have provided means rotatable withthe suction devices, in this embodiment a pair of distending-fingers 5 5for each roll, which may ICO be pivoted to the shafts 3 3 and whichenter between the plies of the bag as the suction devices commence todistend the same and hold the plies against the face of the rolls, asshown. These fingers are thrown inward, preferably by springs 8 on therolls, and are moved outward at the proper times by projections 7 7 fromthe fingers coming in contact with stationary cams 6 6 on the frame.Fig. 9 shows a side elevation of one of the upper cams, and in Fig. 10an edge view of the same cam is shown as it would look if it were splitat B and bent back into a straight bar, the part B 0 being the highest,the portion 0 D the lowest, and D B of intermediate height. The arrowsin Figs. 9 to 12 show the direction in which the projections 7 7 moveover the face of the same. As the rolls move from the position shown inFig. 4 to that shown in Fig. 5 the projections 7 ride off the camfaces BG into recesses O D and the fingers 5 are thrown inwardly by springs 8,whose free ends rest in notches 7 and grip the plies as specified. Thefingers are preferably provided with inclined faces 5 5, so that theywill not tear the triangular fold 5 5 Fig. 3, which result from thedistention of the bottom of the bellows-folded bag into the rectangularform, the part held between the rolls 3 3 being still held fiat. Thefingers define the corners and edges of the bottom, and when they havebeen moved to the position shown in Fig. 1 the bo will not be thrown outtill the lower roll reaches the position shown in Fig. 6. As the rollsare further rotated from the position shown in Fig. 1 the lower edge ofthe bottom of the bag is grasped between the lower roll and roll 4, asshown in Fig. 6. The projections 7 on the lower fingers then strikecamfaces D on lower cams 6 and throw out the lower fingers, and the bagis drawn down between lower roll 3 and roll 4. This will fold over apart-in this case one-halfof the bottom of the bag upon the outside ofthe bag, and in order to assist in this folding and at the same timepress upon the bottom of the bag to prevent the transverse seam C, Fig.7, being pulled apart in case the paste has not dried I have provided abackWardly-moving folder. In this embodiment this consists of atransverse bar 19, carried by slides 17, travcling in guideways in theframe, Fig. 3. These slides 17 are reciprocated by cam-wheel 1e on shaft3 engaging a roller stud 16 on a leverarm 16, attached to rock-shaft 11,which carries levers 12 12, whose upper ends are located between pins 1818 on slides 17. A

spring 15 normally keeps the parts in the position shown in Fig. 5. Thisfolder 19 is thus independent of the rolls 3 3that is, it is notactuated by them, but in this case by cam 14. The bag will thus befolded into the form shown in Fig. 8 and be delivered between lowerrolls 3 and roll 4 at the bottom of the machine. All the rolls in thisembodiment rotate continuouslythat is, in one direction.

When I speak herein of a bag, I do not mean that it must necessarilyinall cases have had the bottom already pasted, and by fiattened I do notlimit myself to an absolutely flat condition, although this ispreferable. The bag might be slightly distended and still be fiat in thesense I use the word.

It will be obvious that many changes may be made in the constructionsherein described and illustrated without departing from the spirit of myinvention, and I therefore do not desire to be limited to the particularembodii ments herein disclosed. 7

What I claim is 7 1. In a bag-machine in combination, a rotatablesuction device adapted to contact with a bag, an exhausting device toexhaust air therefrom, means to rotate said suction de-' vice to distendsaid bag, and means to fold 9S 1 back one side of said distended bottomupon the outside of said bag.

2. Ina bag-machine in combination, a ro'- tatable suction device adaptedto contact with a bag, an exhausting deviceto exhaust air therefrom andmeans to rotate said suction" rope device to distend the bottom of saidbag into I a substantially rectangular form, means to.

hold one part of said rectangular bag-bottom, and a folder to fold backsubstantially onehalf of said bottom upon the outside of said bag.

therefrom, means to rotate said suction device and means to hold andthereby define 5 the edges of said bottom whereby said bottom P isdistended into a substantially rectangular V form, and folding means tofold back part of f V 5;

said rectangular bottom.

4. In a bag-machine in combination a. r0- tatable suction device adaptedto contact with a bag, means to exhaust the air therefrom and i a meansto rotate the same to distend said bag, means rotatable with saidsuction device and bottom.

5. In a bag-machine in combination aro- I tatable suction device adaptedto contact with i a bag, means to exhaust the air therefrom and means torotate the same to distend said bag, means rotatable with said suctiondevice and adapted to engage said bag and assist in distending thebottom of the same into a sub- 3. In a bag-machine in combination, a ro-Y tatable suction device adapted to contact with V a bag, an exhaustingdevice to exhaust air V stantially rectangular form, means to preventone side of said bottom from being folded backward, and folding means tofold back the other side of said bottom upon the outside of said bag.

6. In a bag-machine in combination a rotatable suction device adapted tocontact with a bag, means to exhaust the air therefrom and means torotate the same to distend said bag, means rotatable with said suctiondevice and adapted to engage said bag and assist in distending thebottom of the same into a substantially rectangular form, and arearwardlymoving folder to fold back a part of said bottom.

7. In a bag-machine in combination a plurality of suction devicesadapted to contact with the opposite sides of abag, means to exhaust theair therefrom and rotate the same to distend said bag, and meansrotatable with said suction devices and adapted to engage said bag andassist in distending the bottom of the same into a substantiallyrectangular form, and folding means adapted to fold one side of saiddistended bottom over upon the outside of said bag.

8. In a bag-machine in combination, a plurality of hollowed rolls havingapertures constituting suction devices adapted to contact with the pliesof a flattened bellows-folded bag, means to exhaustthe air therefrom androtate the same to distend said bag, and means rotatable with said rollsand adapted to engage said bag, and assist in distending the bottomthereof into a substantially rectangular form, and folding means adaptedto fold one side of said distended bottom over upon the outside of saidbag.

9. In a bag-machine in combination, a set of rolls provided with suctiondevices and adapted to receive a bag between them and feed the sameforward, means to exhaust air from said suction devices and means torotate the rolls and distend the bottom of said bag into a substantiallyrectangular form, and folding means adapted to fold one-half of saiddistended bottom over upon the outside of said bag.

10. In a bag-machine in combination, a set of hollowed rolls providedwith suction-apertures and adapted to receive between them and feedforward a bellows-folded bag, and means to exhaust air from said rollsand rotate the same and distend said bag into a substantiallyrectangular form, and folding -means adapted to fold one side of saiddistended bottom over upon the outside of said bag.

11. In a bag-machine in combination, a rotatable suction device adaptedto contact with a flattened bellows-folded bag, means to exhaust the airfrom said suction device and rotate the same whereby the plies aredistended distending-fingers rotatable with said suctiondevice and meansto insert the same between said plies and move the same apart anddistend the bottom of said'bag into a substantially rectangular form,and folding means adapted to fold one side of said distended bottom overupon the outside of said bag.

12. In a bag-folding machine in combination, aroll to hold a portionfrom side to side of a bellows-folded bag in a flattened condition,distending-fingers, means to insert said fingers between the plies ofsaid bag near the bottom of said bag and move said fingers apart todistend said plies at the bottom of said bag, and a rearwardly-movingfolder independent of said roll and adapted to press upon the bottom ofsaid bag and turn back a part of said bottom while said fingers aredistending said plies.

13. In a bag-folding machine in combination, means to hold abellows-folded closedbottomed bag, means to distend the bottom thereofinto a substantially rectangular form, and a folding device adapted tosimultaneously press upon said bottom of said bag and fold back aportion of said bottom.

14, In a bag-machine in combination, a plurality of rolls adapted toreceive between them and feed forward a flattened bag, distendingfingersfor each roll rotatable with the same, and stationary cams adapted toactuate said fingers and throw the same inward to engage said bag anddistend the bottom of the same into a substantially rectangular form,and

folding means adapted to fold one-half of said distended bottom overupon the outside of said bag.

15. In a bag-machine in combination a plurality of rolls adapted toreceive between them and feed forward a flattened bag, distendingfingersfor each roll rotatable with the same, and stationary cams adapted toactuate said fingers and throw the same inward to engage said bag anddistend the bottom thereof into a substantially rectangular form, andfolding means adapted to fold one side of said distended bottom overupon the outside of said bag.

16. In a bag-folding machine in combination, a pair of continuouslyrotating rolls adapted to receive a flattened bellows-folded bag betweenthem and feed the same forward, means rotatable with said rolls andadapted to grasp said bag forward of said rolls and distend the same,and a folding device to fold back a part of the bottom of said bag uponthe outside of the same.

17. In a bag-folding machine in combination, a pair of continuouslyrotating rolls adapted to receive a flattened bellows-folded bag betweenthem and feed the same forward, distending-fingers rotatable with saidrolls and adapted to enter between said plies and grasp the same forwardof said rolls and distend the bottom of the bag into a substantiallyrectangular form, and folding means adapted to fold back a part of saidbottom upon the outside of said bag.

18. In a bag-foldin g maehine in eombinaand turn back a part of saidbottom while said 1o 7 7 tion, aroll to hold a portion from side to sidefingers are distending said plies. V

of a bellows-folded bag in a flattened eondi- Signed at New York, N. Y.,this 5th day of tion, distending-fingers, means to insert said December,1900. 5 fingers between the plies of said bag near the I,

bottom of said bag and move said fingers GEORGE WARD apart to distendsaid plies at the bottom of YVitnessesz' said bag, and arearwardly-moving folder EMERSON R. NEWELL,

adapted to press upon the bottom of said bag JOSEPH E. DIAMOND.

